I'm new to DCC and programming CVs. I've just installed a TCS decoder in a Model Power 0-6-0T, formerly DC. All is working beautifully, but the engine accelerates aggressively and tops out at an unrealistically high speed--just like it did on DC.
I think I know I have the options of adjusting Start, Mid, and Top voltages, modifying speed curves, and/or changing the values of the loadable speed tables.
My goal is to limit the top speed and accelerate smoothly to get there. Can anyone point me in the right direction and give me some guidelines as to the values with which to start? Is it trial and error or will a few standard steps do it?
(I did search for prior posts to help me but didn't find anything to fit the bill.)
Thanks.
Rick Krall
Rick, what DCC system are you using? Do you have a computer interface with it?
The reason I ask is that this type of thing is so simple using the free Decoder Pro application. The speed curve user interface allows you to quickly set up the type of speed response that you want.
Failing that, then IMO the simplest thing to do is to adjust CV's 2, 6 and 5 Start, Mid and Max respectively. Try entering CV2 =2 CV6 = 48 CV5 = 98 as a start.
Just increase/decrease CV5 to change the top speed to your liking and then adjust CV6 to be about half way between CV2 and CV5
Simon Modelling CB&Q and Wabash See my slowly evolving layout on my picturetrail site http://www.picturetrail.com/simontrains and our videos at http://www.youtube.com/user/MrCrispybake?feature=mhum
Thanks, Simon. I have an NCE Power Pro system. I haven't looked into Decoder Pro, although I've heard of it. I'll check it out and in the meantime try your suggestion, which I appreciate.
davidmbedard Ok...this has been covered countless times before....
Ok...this has been covered countless times before....
Sorry, David; I tried to find the answer in prior posts but couldn't; I apologize if I tried your patience. Not my intention.
I do appreciate your reply, however, and will add it to my programming notes. Between you and Simon, I have some good advice to get me started.
As others have suggested adjusting CV2, 5, and 6. Most of the time adding a little momentum in CV3 and some deceleration in CV4 will smooth out your speed demon. The newer TCS decoders have great BEMF that is enabled in CV61. When you find the start voltage setting in CV2 enable the BEMF in CV61. If you don't want BEMF than adjust Dither in CVs 57 and 56. Keep notes on the changes you make and test it after every CV change that way you can change it back if you don't like the change without doing a reset.
Pete
I pray every day I break even, Cause I can really use the money!
I started with nothing and still have most of it left!